Title:Entanglement harvesting from the electromagnetic vacuum with hydrogenlike atoms

Abstract: We study how two fully-featured hydrogenlike atoms harvest entanglement from
the electromagnetic field vacuum, even when the atoms are spacelike separated.
We compare the electromagnetic case ---qualitatively and quantitatively--- with
previous results that used scalar fields and featureless, idealized atomic
models. Our study reveals the new traits that emerge when we relax these
idealizations, such as anisotropies in entanglement harvesting and the effect
of exchange of angular momentum. We show that, under certain circumstances,
relaxing previous idealizations makes vacuum entanglement harvesting more
efficient.